Jack Sloper and Andrew Kirke
Sloper and Kirke replace Fred and George Weasley as Beaters on the Gryffindor Quidditch team. They are both pretty appalling. In fact, during the Gryffindor match against Hufflepuff, Kirke manages to shriek and fall backwards off his broom when Zacharias Smith comes flying towards him. It doesn't get much more embarrassing than shrieking in fear during game play.